package jdbc;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.Scanner;

public class JDBCDemo9 {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        System.out.println("请输入用户名：");
        String username=sc.next();
        System.out.println("请输入密码：");
        String password=sc.next();
        try(Connection connection=DBUtil.getconnection();){
            String sql="SELECT username,password,nickname,age\n" +
                    "FROM userinfo\n" +
                    "WHERE username=? AND password=?";
            PreparedStatement ps=connection.prepareStatement(sql);
            ps.setString(1,username);
            ps.setString(2,password);
            ResultSet rs=ps.executeQuery();
            if(rs.next()){
                String name=rs.getString("nickname");
                System.out.println("登录成功！欢迎您，"+name);
            }else{
                System.out.println("登录失败！");
            }
        }catch(Exception e){
            e.printStackTrace();
        }
    }
}
